Share 'Design options for conditioned attic retrofit'

I have a customer retrofit and want to get some opinions on designing the retro. It is a conditioned attic with batts on roof deck from the side attics to the upper attic. Upper attic is blown cellulose on ceiling. Lots of bypasses. They installed poly over the batts in the side attic. We are climate zone 5 in northern arizona 7500 hdd, and pretty dry here. Don't like a vapor impermeable air ba…